Sack-sewing machine.



P. ARRIGHI.

SACK SEWING MACHINE.

APPLICATION FILED IAN. w. 1915.

1,153,009. I PatentedSept. 7, 1915.

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SACK SEWING MACHINE.

APPLICATION FILED IAN. 1a. 1915.

Patented Sept. 7, 1915.

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SACK SEWING MACHINE.

I\PPLICATION FI LED MN. 18.1915- PatentedSept. 7', 191 5.

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Specification of Letters Patent. 7

Patented Sept. 7, 1915.

Application filed January 18, 1915. Serial No. 2,895.

. To all whom it may concern:

tion of the same, such Be it known that I, PIETRo Amour, a subject of the Kingdom of Italy, residing at San Jose, in the county of Santa Clara and State of California, have invented cer tain new and useful Improvements. in Sack- Sewing Machines; and I do declare the following to be a clear, full, and exact descripas will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to improvements in means for sewing sacks after they are filled, and is adapted for use in connection with any sack filling machine as well as for sacks that are filled by hand.

The principal object of my invention is to take the sacks when they are filled, guide them into position in the machine and sew them up in a rapid and effective manner at the same time that the ears are being formed and tied on the corners thereof. The ear forming and tying mechanism designed for use in connection with this sack sewing machine forms the subject matter of a separate ap lication.

ther objects of my invention are: to produce a device of the character indicated that will be automatic in action, that will operate the ear forming and tying mechanisms above refered to in such a manner as to cooperate with the sewing mechanism, and that will discharge the sack when said operations are complete.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

On the drawings similar characters of reference indicate corresponding parts in the several views.

Figure 1 is a front elevation of my invention, parts being broken away[ Fig. 2 is a left end elevation of the same. Fig. 3 is a section on line,A-A of Fig. 1. Fig. 4 is a right end elevation of my invention. Fig. 5 is a detail plan view of the sack receiving jaws in position, parts being broken away. Fig. 6 is a side elevation of the same. Fig. 7 is a cross section of the tube upon which the sack receiving jaws are mounted. Fig. 8 is a detail section showing the mounted needle. Fig. 9 is an elevation of the jaw clutch. 10 is a left end elevation of the same. Fig. 11 is an elevation of the sleeve mounted on main shaft 9. Main shaft 9 is continuous throughout its entire length except at gear connection 21, the purpose of which is hereinafter described.

At 10 are shown standards in which are mounted a series of rollers 11 upon which travels belt 12. Belt 12 is operated by roller 13 mounted in standards 10 and driven by gear 14 and gear 15, said gear 15 being keyed to the extremity of main shaft 9. It is upon this belt 12 that the sack 16 travels when moving into position for sewing.

When sack 16 a proaches said position it engages button 1 on rod 18 and pushes the same backward whereby jaw clutch 19 is thrown out of engagement with sleeve 20 to which gear 21 is keyed, thereby permitting main shaft 9 to revolve freely in said sleeve 20 while the roller mechanism for receiving the sack is inoperative. Jaw clutch 19 is keyed to shaft 9 and connected to rod 18 by yoke 19*. While sack 16 is being brought into position on belt 12 it is necessary to provide a mechanism which will guide the upper edge of said sack into the proper position for the sewing operation. accomplished-by means of sack receiving jaws 22 pivoted as shown at 23 to tube 24. Catch 25 is pivoted to the outer end of one of jaws 22 and adapted to drop into engagement with the other jaw when both of said jaws are brought together, and to lock said jaws together as shown in Fig. 5. A spring, as 26, forces said jaws 22 apart when catch 25 is disengaged. Jaws 22 are open ated in connection with belt 12 as hereinafter described, so that as sack 16 advances on said belt 12 jaws 22 are thrust forward while in an open position. At the proper moment the beveled portions 22* on jaws 22 engage pins 27, in plate 27*, which forces said jaws 22 together and allows catch 25 This is' to fall into position and lock said jaws on the upper edge of sack 16. The direction of movement of jaws 22 is now instantl reversed and thetop edge of the sac 16 guided into position in slot 27 in plate 27" beneath the ear forming and tying mechanism andin position for sewing the end of catch 25 riding up on beveled bar 28 and allowing spring 26 to throw said jaws apart while the above mentioned operations are taking place. The inner edges of jaws 22 are formed as shown at 29 to permit the free operation of the ear forming mechanism at that end of the jaws which do not open sufficiently to permit said operation. Jaws 22 are attached to tube 24 in such a way as to operate close to and beneath the needle which operates through said tube 24. Tube 24 is connected by collar 29 to threaded sliding shaft 30, which is driven by internally threaded sleeve 31 positioned in bearings 32,'said sleeve 31 being driven bybelt 33 on pulley 34. Pulley 34 is mounted on shaft 35, said shaft 35 being driven alternately in opposite directions by pulleys 36 and 37 respectively mounted thereon, said pulley 36 being connected to pulley 38 on shaft 39 by belt 40, and pulley 37 being connected to pulley 41 on shaft 39 by crossed belt 42. 'When jaws 22 are being driven forward the belts are in the position shown, belt 42 being on loose pulley 43 and pulley 44, but when the belts are shifted and the movement reversed belt is moved to loose pulley 45 and pulley 46. Belts 40 and 42 are shifted at the proper intervals by means of a shifting rod 47 operated by arm 48 on collar 29 and operating against collars 49 on said rod 47. Shaft 39 is gear driven as indicated at 50. It may thus be seen that the entire mechanism for positioning the sack 16 is operating while jaw clutch 19 is in engagement with sleeve 20. When sack 16 is positioned it automatically disengages jaw clutch 19 as above described and throws it into engagement with sleeve 51, whereupon the mechanism for sewing the sack and for operating the ear forming and tying and the sack discharging mechanisms is set in motion.

' The ear forming mechanism is driven by a shaft 52, said shaft 52 being gear driven as shown at 53, bevel gear 54 being keyed to sleeve 51. The ear tying mechanism is driven by means of a rack 55, vconnecting rod 56, arm 57, and pin 58, said pin 58 being vertically mounted in bearing frame 5 as shown, and gear driven from shaft 52 as indicated at 59. The sack sewing mechanismis operated simultaneously with the ear forming and ear tying mechanisms. Shaft 60 is gear driven as shown at 61, and

has tight pulleys 62 and 63 and loose pulleys 64 and 65 mounted thereon. On main driving shaft 9 is positioned a loose drum spectively, belt 68 being a crossed belt operating on tight pulley 63 when belt 67 is on loose pulley 64, and on loose pulley 65 when belt 67 is on tight pulley 62. Belt 69 is driven by drum 66 and drives a hollow threaded shaft 70 which operates in threaded bearing 71. On the outer end of shaft 70 is secured a spiral needle 72 having an eye 73 near its point, said needle operating through tube 24 as hereinbefore described and shown in detail in Fig. 8. A spool is shown revolubly mounted on a bracket at 75 from which thread 76 is fed to eye 73 throughthe interior of shaft 7 0 and through 'tube 24. Belts 67 and 68 are shifted by and backward with shaft 70 which it drives.

After the above described operations have been completed it only remains for sack 16 to be discharged. This operation is performed by a curved bar 83 pivoted at 84 and having a rounded head as 85. Mounted on shaft 52 is a cam 86 which, during the above described operations, permits bar 83 to rest as shown in Fig. 4. When said operations are completed the enlarged portion of cam 86 engages head 85 and forces it outward, thus throwing the lower end of said bar 87 inward and forcing the sewed and tied sack 16 off of belt 12, whereupon spring 87 throws rod 18 forward, jaw clutch 19 is again thrown into contact with sleeve 20 and the sack receiving mechanism is again set in motion. Arm 88 is appended to the lower end of bar 83 so that it will engage button 17 on rod 18 when sack 16 is being thrown off of belt 12 and prevent shifting rod 18 from springing forward and starting the feeding mechanism until said sack is en tirely'clear of belt 12. In order that said fr 83 will spring back quickly and leave It 12 clear for the next sack, cam 86 is frmed with a flat side as shown at 86 so that head 85 may be pulled back suddenly by spring 86", thus releasing rod 18 and starting the feeding mechanism as above described. I

Having thus described my invention, what I claim as new and desire to secure by Letreciprocating manner above said jaws and alternately with respect to the movement of said jaws, as described.

2. A. device of the character described, comprising the combination with a member provided with a slot, of a' pair of jaws hinged together and movable in a reciprocating manner above said slot, a catch secured near the end of oneof said jaws adapted to lock said jaws when forced together, means for forcing said jaws together when in an extended position, means for unlocking said jaws when in a retracted position, and a spiral needle operating in a reciprocating manner above said jaws, as shown and described.

3. A sack sewing machine comprising the combination'of a sack carrier having driving means operatively connected thereto while a sack is being positioned for sewing, means operated by said sack for rendering said driving means inoperative when said sack is positioned for, sewing, and an arm pivotally mounted on said machine and op-. eratively connected to said driving means for discharging said sack when sewed, as

shown and described.

4. In a sack sewing machine, the combi-' nation of a sack feeding mechanism having drivin means operatively connected there- 7 to whi e a sack is being positioned for sewing, mechanism operated bythe sack for rendering said sack feeding mechanism inoperative while the sack being sewed, a cam shaft operatively connected to said driving means, a cam-mounted on said cam shaft having one half of the projecting portion thereof removed, a bar pivotally mount- 7 ed on said machine having a head rounded on its upper side and flat on its under side and adapted to engage said cam, said bar having an outwardly projecting arm formed upon its lower extremity so positioned as to arrest the return movement of the sack operated mechanism until the sack is wholly discharged as shown and described;

5. In a device of the character described, the combination of a pair of hinged jaws mounted upon the end of a tube operating in a reciprocating manner, a hollow shaft operating in a reciprocating manner through said tube and at alternate periods with respect to said jaws, and a spiral needle mounted on said hollow shaft in such a manner that a thread may be passed through said hollow shaft and said tube to the needles point.

6. A sack sewing machine, comprising the combination of a sack carrier having driving means operatively connected thereto while a sack isbeing positioned for'sewing,

means operated by said sack for rendering said driving means moperative when said sack is positioned for sewing, a pair of reciprocatmg hinged jaws positioned a dis tance above said carrier and cotiperating with the same, a reciprocating spiral needle carrying a thread an operating adj acent to said jaws and at alternate periods withrespect thereto, substantially as shown and described.

In testimony whereof I have hereunto afiixed my signature in the presence of two subscribing witnesses.

PIETRO ARRIGHI.

Witnesses:

Jorm A. Nars'm'rn, v J. B. Camnns. 

